Thank you very much! Probably there are more puzzles around the purple light, but some of the puzzles I've discarded had a very similar idea to those already present in the game. I also failed at understanding the combination between the different lights and that's why there are only a few of this nature. A problem I encountered is that interesting situations needed a lot of lights, which I find kind of ugly unless there is a good construction to that "final level"; unable to find that elegant ramp, I discarded most of the big puzzles.